import java.util.*;

public class Sensor extends Observable {
  int temp = 69;
  void takeReading() {
    double d = Math.random();
    if(d>0.75) {
      temp++;
      setChanged();
    } else if (d<0.25) {
      temp--;
      setChanged();
    }
    System.out.println("Temp: "+temp);
  }

  public int getReading() {
    return temp;
  }
}